Business membership costs just £249 + VAT per year.
ITM also offers Connect membership which is free. which is free and includes access to two free Starter kits. Being a Connect member allows you to pay for the ITM events you attend and resources/tools you use as you use them. Connect membership does not include access to the ITM Member Directory or complimentary GBTA Membership.
I am a new member of the ITM and I find the events I have attended so far invaluable.